Rotary-disk plow.



Patented Feb. l3, I900.

M. T. HANCOCK.

ROTARY DISK PLOW.

(Application filed Dec. 5, 1899.1

(No Model.)

I Mar/ray No. 643,499. Patented Feb. l3, I900.

M. T. HANCOCK.

ROTARY DISK PLOW.

(Appl t 11 fl] d D 5 1699\ (No Model.) 3 Sheets-Sheet 2.

Mai/16.9563:

JIL'Zi/Z 2 1223221 No. 643,499. Patented Feb. l3, I900.

. M. T. HANCOCK.

ROTARY DISK PLOW.

(Application filed Dec. 5, 1899.\ (No Model.) 3 Sheets-Sheet 3.

waif 1.9.9.966

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NITED. STATES PATENT OFFICE.

MILTON TAYLOR HANCOCK, OF SI-IREVEPORT, LOUISIANA.

ROTARY-DISK PLOW.

SPECIFICATION forming part of Letters Patent N 0. 643,499, datedFebruary 13, 1900.

Application filed December 5, 1899. Serial No. 739,284. (No model) ToaZZ whom it may concern.-

Be it known that I, MILTON TAYLOR HAN- COCK, a citizen of the UnitedStates of America,and a resident of Shreveport, in the parish of Oaddoand Stateof Louisiana, have made a certain new and useful Improvement inRotary-Disk Flows; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to whichit appertains to make and use thesame, reference being had to the accompanying drawings, which form partof this specification.

Thisinvention relates to rotary-disk plows in which the plowing is doneby a disk which is rotatably mounted upon a suitable frame. The objectof theinvention is to provide an improved beam or frame and frame adjustment, to improve the disk and its mounting in such a manner that thesaid disk will not be torn from its fastenings or become loosened,

and to provide an improved scraper and adjustment therefor which insuresthe clearing of the face of the disk and facilitates the turning of thedirt in the furrow, the details of all of which will he hereinafterfully specified.

In the accompanying drawings, Figure 1 is a plan view, and Fig. 2 is aside elevation, of the plow complete. Fig; 3 is a sectional view of thedisk and the mounting therefor. Fig. 4 is a side elevation of the sameparts, showing the scraper and the adjusting device. Fig. 5 is a faceview of the disk, showing the peculiar form of thescraper. Figs. 6 and 7are enlarged detailsectionalvie ws showing the. pivotal connectionsbetween the beamsections.

In the figures like reference characters are uniformly employed in thedesignation of corresponding elements of construction.

As best shown in Fig. 1, the beam consists of three sections marked 1,2, and 3, respectively, which are pivotally secured together andprovided with such stops as would be deemed desirable for limiting alateral movement relative one to each other. As'shown in Figs. 1 and 7,the forward beam-section 3 and the second or intermediate beam-section 2are pivotally connected by means of a vertically-arranged pin 3, and, asshown in said Fig. 1. and also Figs. 2 and 6, the beam-sections 1 and 2are pivotally connected by means of a pin 2 in the particular instancein the drawings, said pinbeing formed by a bent-over portion of thebeam-section 1. The front section 3 is made of a flat spring. It is tothis section 3 that the tongue is secured by means of a simple clevis 4,which, however, need not be itself vertically adjustable, inasmuch asthe resilience of the portion of the beam 3 provides for any desiredadjustment thereof. Under the section 3 of the beam there is mounted avertically adjustable gage-wheel 5, made adjustable by means of asliding block 6, Fig. 2, and suitable connections with the lever 7,whereby said block may be moved along a vertical gnideS, as best shownin Fig. 1. To the forward end of the section 2 of the beam is securedabent axle 9, which is partially rotatable by means of the lever 10,secured thereto, and carries on its offset end a wheel 11. The portion 1of the beam consists, preferably, of a bar pivotally secured to the backend of the section 2' of the beam and having its end turned outwardlyand downwardly, carrying a wheel 12, which forms the third bearing-pointfor the plow. To the back end of the section 2 of the beam is securedasuitable seat 13. There being a wheel upon each'section of the beam,the various strains are divided between said sections as far as thecarrying of the weight is concerned. The central section 2 of the beamis bent laterally at about its middle portion, its front portion lyingsubstantially parallel to the line of draft, while the back portion liesat an angle thereto in a substantially horizontal plane. Secured toandprojecting downwardly from this angular portion of said beam is ahanger 14:, which has upon its lower end a hanger perforated at an angledownwardly. This lug may obviously be of many forms; but it should becapable of being secured to the said section 2 of the beam with theutmost rigidity. The lug at the lower end is perforated axially and thedisk 15 concaved upon its face and having. an annular depression thereinand being provided with a stem 16 is mounted by said stem therein, so asto rotate freely. The said disk 15 and stem 16 are perforatedconcentrically, and in the face of the disk, concentric with the saidperforation, is a conical opening.

too

17 is the plow-disk, which is concaved, as usual; but instead of havingthe usual small hole in its center, made by removing a certain portionof the metal at that point, it has the metal pressed into funnel shape,whereby a conical hollow lug is formed upon the back side of the disk 17and the disk so strengthened and stiffened at that point that all dangcrof buckling or tearing under ordinary strains is done away with.

18 is a bolt which is adapted to pass through the longitudinalperforation of the backingdisk 15 and its stem 16 and is provided with ahead conical in form to lit the conical interior of the lug on the disk17, so that when said bolt is tightened into place the said conical headis drawn firmly into the aforesaid conical lug, drawing it in turn intothe conical recess in the front of the disk 15, expanding it to fittherein, and firmly drawing the disk 17 into contact with the face ofthe disk 15, and the outer side of the said conical lug on the disk 17into firm, reliable, frictional contact with the conical recessaforesaid.

19 is a washer which is adapted to be drawn by the nut 20 upon the bolt18 into contact with the end of the stem 16, but slightly short ofcontact with the end of the hub on the hanger 14, whereby it is plainthat the bolt 18 will be drawn to operation, as aforesaid, withoutcausing the binding of the stem 16 in its bearing.

Secured to the hanger 14 is an arm 21, which is extended in suchdirection and should be of such shape and size as will carry the partsto be attached thereto, having, however, its upper end bent intoapproximately a horizontal position and dentated on its upper surface. Aslot is made therein opening downwardly through said dentated surface,and upon this said surface rests a block 22, perforated to receive thebolt 23 and dentated upon its lower surface correlatively with the uppersurface of the bar 21. The bolt 23 passes downwardly through the saidblock 22 and the slot in the arm of the bracket 21 and through a foot 24on the upper end of a standard 25. On the lower end of this standard,secured thereto in any suitable manner, but preferably by rivets orcountersunk bolts, is the scraper 26. This scraper is formed, as bestshown in Figs. 4 and 5, in the shape of a section of a hollow cylinderof edge contour approximately as shown, by means of which thescraper-point 27 is brought to substantially the center of the bolt 18,and the said cylindrical section is made to fitor correspond to theconcavity in the disk 17. The upper outer corner of this scraper extendsslightly beyond the edge of the disk in order that the dirt cleared andturned by the said scraper shall in no wise again come in contact withthe plow-disk. It will be seen, especially upon reference to Fig. 5,that this form of scraper will always conform to the concave face of thedisk and be brought into contact with the said face and will wear insuch a manner as will continue to fit; further, that the scraper-point27 at the center of the disk affords extremely little resistance to thepassage of the dirt taken from the furrow from the face of the diskacross said scraper, and that said scraper, partaking somewhat of thenature of the moldboards of a turn-plow, will not only perform thisfunction of scraping, but will also do the work of such moldboard. Thescraper will at all times be braced under excessive strain against anyresilient movement by contacting with the concaved face of the disk,while it may be adjusted to and from such contact to any necessaryextent by means of the bolt 23 and the block 22, engaging, as beforestated, the dentated surface upon the bracket 21.

It will be understood that as the forward beam-section 3 is made ofspring-steelor other suitable resilient material it will be free to moveup and down, so as not to require any adjustment for a high or lowhitch, and this also prevents throwing the doublctree up and down whenthe wheels run over uneven surfaces. The plow is made much moreeffective by having a wheel separately mounted on each beam-section, asthe various strains are thereby equalized or divided between saidsections.

The funnel-shaped opening in the center of the plow-disk not only servesas a recess for the head of the bolt, but strengthens that part of thedisk and obviates any liability of its being torn out or broken. Bycurving the lower edge of the scraper 26 in such mannor as to cause itto fit the concavity of the plow-disk it will not only more effectivelyclean said disk, but at the same time will carry off and turn over thesoil. The provisions made for adjustment of this scraper are of such acharacter that the scraper will be braced at all times against anyexcessive strain, while at the same time the scraper may be adjusted toand from the coneaved face of the plow-disk to any extent desired.

Having thus described my invention, what I claim as new, and desire tosecure byLetters Patent of the United States, is-

1. In a rotary-disk plow, a frame consisting of three sections pivotallyconnected by their correlative ends so as to have movement in ahorizontal plane, a wheel mounted on each section and a plowing-diskmounted on the intermediate section.

2. In a rotary-disk plow, a beam consisting of three pivotally-connectedsections, a wheel mounted on the front section near its back end, awheel mounted on the intermediate section near its front end inapposition to the first-named wheel, a wheel mounted on the free end ofthe back section, and a plowingdisk mounted on the intermediate section.

3. In a rotary-disk plow, a frame consisting of three sections, thefront section being of resilient material, and provided at its front endwith means for attaching the draft-animals, said sections beingpivotally connected by the correlative ends so as to have movement in ahorizontal plane, a wheel mounted on each section and a plowing-diskmounted on the intermediate section.

4. In a rotary-disk plow, a plow-disk having a perforated conicalprojection upon its back side at' its center and means for mounting thesaid plowing-disk consisting of a backing-disk axially perforated andadapted to be mounted rotatably and provided with a conical recess inits center adapted to receive the aforesaid conical projection upon theplowing-disk and a bolt adapted to pass through said disks and clampthem together.

5. In a rotary-disk plow, a plowing-disk having a hollow lug projectingfrom its back side and correlatively conical as to its interior andexterior sides, and means formounting the said plowing-disk consistingof a backing-disk concave on its face, axially perforated, and providedwith a conical recess in its center adapted to fit the said conical lugand a bolt having a conical head and adapted to pass through saidplowing and backing disks and clamp them together.

6. In a rotary-disk plow, a plowing-disk having the metal at its centerpressed back wardly to form a hollow lug perforated at its apex andcorrelatively conical as to its interior and exterior sides, and meansfor mounting the said plowing-disk consisting of a backing-disk concaveon its face, axially perforated, provided with a conical recess in itscenter adapted to fit the said conical lug and a bolt having a conicalhead and adapted to pass through said plowing and backing disks andclamp them together.

7. As a new article of manufacture a disk for rotary-disk plows, formedfrom a single sheet of metal out in circular form, bent concaving andhaving the metal in its center pressed beyond its convex side so as toform a hollow cone perforated at its apex.

8. In a rotarydisk plow, a plowing-disk and a scraper supported inoperative relation to the concaved face of said disk and consisting of aplate of metal bent in the approximate form of a segment of a cylinder,its lower edge being curved to conform to the concave disk.

9. In a rotary-disk plow, a plowing-disk and form of asegment of acylinder, its lower edge being curved to conform to the concave disk,and its upper edge being curved at the inner corner said curved edgesconverging in a point opposite the center of the disk.

10. In a rotary disk plow, a rotatablymounted plow-disk, a scrapermounted in operative relation to the concaved face of said disk andhaving its lower edge curved to conform thereto, an arm secured to saidscraper and provided with a foot on its upper end, a bracket alsoprovided with a foot on its upper end, said last-named foot beingdentated on its upper face and slotted, a perforated block correlativelydentated on its lower side, and a bolt adapted to pass through saidblock and feet and clamp the same rigidly together.

11. In a rotarydisk plow, a rotat-ablymounted plowing-disk of concaveform and provided at the center with an axially-perforated coneprojecting beyond the convex side of said disk, means for mounting theplowing disk through said hollow cone, and a scraper consisting of aplate of metal bent in the approximate form of a segment of a cylinderand having its lower edge curved to conform to the concaved face of saidplow-disk.

12. In a rotary disk plow, a rotatably* mounted plowing-disk having aconcave face, a scraper consisting of a plate of metal bent to theapproximate form of a segment of a cylinder and having its lower edgecurved to conform to the concaved face of the plowingdisk and the upperedge curved at its inner corner, said curved edges of the scraper be ingconverged in apoint opposite the center of the plowing-disl;,-and meansfor mounting said plowing-disk and scraper in operative relation.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

MILTON TAYLOR HANCOCK.

